Does metadata increase file size....

Does metadata info have any measurable affect on the final size of a pdf exported from InDesign? If you were to drag multiple pdf graphics into an InDesign document, then export that document as a final PDF, would metadata info from the individual pdfs affect the final pdf file size?

Also, could a large amount of metadata info cause a pdf to have problems outputting through various devices (speeddrivers, printers, Asura, etc.).